Sabine, protonation

Equations (16) and (17) were then used to calculate the molecular orbital contributions to and - just as Oddershede and Sabin did in their more accurate calculations - a table for the velocity-dependence of core, bond, and lone-pair contributions to Se for protons was constructed [25,42], These results together with equation (10) lead to the calculation of the proton stopping cross section in compound materials with chemical binding effects incorporated. 

Fig. 2. Velocity dependence of the electronic stopping cross section for protons in propane. (—) prediction by the OLPA-FSGO treatment [42]. ( ) Oddershede and Sabin calculations [29]. (----) best fit curve to experimental data from Refs. [44,45].

Sorensen and co-workers799-801 have studied the fate of observable camphene hydrocation 190 prepared from isoborneol 187, camphene 188, or tricyclene 189 in HSO3F acid medium (Scheme 5.74). The intermediate cycloalkenyl cation 191 can also be prepared by protonation of a-terpineol (192), sabine (193), and /3-pinene (194) (Scheme 5.75). 

R. Cabrera-Trujillo, Y. Ohrn, E. Deumens and J.R. Sabin, Stopping cross section in the low to intermediate energy range Study of proton and hydrogen atom collisions with atomic N, O, and F, Phys. Rev. A, 62 (2000) 052714. 

R. Cabrera-Tmjillo, J.R. Sabin, Y. Ohrn and E. Deumens, Energy loss studies of protons colhding with ethane Preliminary results, J. Electron Spectrosc., 129 (2003) 303-308. 

In a later paper Chouinard and Gustafson (1971) reported angular correlations of positron annihilation in erbium, gadolinium, holmium and ytterbium hydrides. The correlations were again claimed to be consistent with the predictions of the protonic model. Recent studies on yttrium dihydride (Sabin et al., 1972 Rozen-feld and Debowska, 1975) were interpreted on the basis of the proton model, but it was pointed out that the model fails for higher hydrogen concentrations, i.e. YH2-YH3 (Rozenfeld and Debowska, 1975). 

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